* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html,body {
    width: 100%;
    background-image: url("../img/摇滚乐队.jpg");

    /* 不会让图片重复出现 */
    background-repeat: no-repeat;

    /* 将图片全部覆盖 */
    background-size: cover;
    
}

.nav {
    width: 100%;
    height: 40px;
    display: flex;
    justify-content: left;
    background-color: rgba(51, 51, 51, 0.3);
    color: white;
    align-items: center;
}

.nav img {
    margin-left: 10px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.nav .title {

    width: 1450px;
    margin-left: 10px;
}

.nav a {

    margin-left: 10px;
    margin-right: 10px;
    text-decoration: none;
    color: white;
}



.container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
}

/* 右侧部分, 用来放置正文 */
.container .contain-right {
    height: 1000px;
    /* 和左侧部分中间留出 5px 间隙 */
    width: 70%;
    overflow: auto;

}
/* 左侧部分, 用来放置用户信息 */
.container .contain-left {
    width: 30%;
    height: 1000px;
}
